Lighting device



FIG. 1 is a front side perspective view showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left view thereof; and,

FIG. 7 is a back side view thereof. 

I claim the ornamental design for a lighting device, as shown and described. 